Texans receiver Andre Johnson may not be available to help his quarterback get out of a serious funk.

Johnson did not practice on Wednesday and missed most of Thursday’s work due to a hamstring injury, coach Gary Kubiak said. Johnson will be a game-time decision ahead of Houston’s kickoff against the St. Louis Rams.

That’s not good news for Matt Schaub, who received only a mild endorsement from Kubiak following a fourth-consecutive week in which the quarterback threw an interception that was returned for a touchdown.